Molder&#39;s flask



` @en Z, 1949 HK. MCGAVOCK MULDER S FLASK 2 Sheets-Sheet l Filed May 31, 194e I OO oo HUGH K. MQGAVOCK Patented Dec. 20, 1949 UNITED STATES PATENT OFFICE MoLDERs FLASK Hugh K. McGavock, Lynchburg, va.

Application May 31, 1946, Serial No. 673,407

2 Claims. 1

The present invention relates to a molders flask, and more particularly, to a iiask for use in mechanical molding, having removable bars.

As is well known in the prior art, the primary purpose for employing removable bars in a molders iiask is to provide means to readily vary the flask width. Hitherto, the removable bars of flasks of this type have shown a tendency to shake loose, especially when the flasks have been used in mechanical molding in which jolt ram molding and an automatic vibrating shakeout is employed. Moreover, the means employed to secure the bars to the flask have usually required considerable space which may prevent the bars from being properly spaced for the contemplated pattern. The devices for securing the bars to the iiask are also often cumbersome to employ.

One of the objects of the present invention is to avoid the above mentioned disadvantages of the prior art. Another object of the present invention is to provide a molders ask, the bars of which may be readily removed or secured either crosswise or lengthwise of the flask.

Still another object of the present invention is to provide a molders ask of the character described. in which the close center to center spacing of the bar holding ribs enable the bars to be removably secured in the exact position required f or the contemplated operation with not more than a slight offset required at each end of the bar or bars.

A further object of the present invention is to provide a ilask of the character described in which only a set of bolts need be tightened to secure the bar in position in such a manner that it is, for practical purposes, as rigid as if it were anintegral part of the flask. y

With these and other objects in view, which may be incident to my improvements, the invention consists in the procedural steps and the parts and combinations hereinafter set forth and claimed with the understanding that the necessary elements comprising the invention and the procedural steps and their operation may be varied by those skilled in the art without departing from the spirit of the invention or the scope of the appended claims.

Broadly, the invention embraces the concept of providing a molders ask having removable bars which only require the use of a set of standard bolts to secure each bar to the flask in such a manner that it is, for all practical purposes, as rigid as if it was an integral part of the ask.

This simplified construction enables the centers of the ribs which assist the bolts in holding the bars, to have a close center to center spacing. In this manner, the bars, with at most, a slight ofiset required at each end of the bar or bars, may be secured in the exact position required for the contemplated operation.

It will be readily appreciated that this construction is highly advantageous, because it not only enables the flask to withstand the stresses of mechanical molding without being shaken apart but also enables the bars to be quickly and easily rearranged or removed for storage.

In the drawings:

Figure 1 is a plan view of the iiask embodying the present invention showing the ends of a pair of bars secured between the rib structure and the removable bolts.

Figure 2 discloses a side elevational viewof the ask shown in Figure 1.

Figure 3 is a view taken along the lines 3-3 of Figure 4.

Figure 4 is a fragmentary plane view of a corner of the flask.

Figure 5 is a view taken along the lines 5--5 of Figure 3.

Referring more particularly' to the drawings, there is shown in Figure 2 a molders flask, generally indicated by the numeral I, which comprises a cope section 2 and a drag section 3-. These separable portions may be held together with lugs of any suitable type. They are made of any suitable material, such as cast iron or steel or are fabricated from steel plate, either by welding or from a combination of pressed steel sectionsweldf ed together. Each of the sectionsv 2 and` 3 are provided with trunnions 4, for use for raising or lowering the ask. Y

The flask sides of each section are provided with a plurality of spaced rows of apertures 5, which extend vertically down the depth of the flask. The diameters of these apertures are sufcient to accommodate a standard bolt. A series of equally spaced vertically extending ribs 6 are also secured to, or formed integrally with, the interior surface of the sides of the flask.

As best shown in Figures 3, 4 and 5, the vertically extending ribs 6 project from the interior surface of the flask between adjoining rows of apertures 5 and each rib is provided with a serrated side portion 'l spaced from one of the rows of apertures and a flat-side portion 8 in .juxtaposed relation to the remaining row of apertures and tapering therefrom.

As best shown in Figures 1 and 5, the ask bars l extend either lengthwise or crosswise of the llask and are removably secured to a selected pair of ribs 6 positioned on the opposite sides of the flask. These flask bars may be made of any suitable material, such as cast iron, steel, or may be fabricated from steel plate.

One side of each bar is provided with vertically extending serrations: H at each endfothe bar, which arer designedMto-t the 'serrations 'Il oi the selected ribs. The opposite side l2 of the bar flares outwardly at each end to iill the space between the rib 6 and the adjacent row oiapertures which border the space. One or more bolts I3, depending upon the width ofthefbar, are provided to secure each end of the bar to the flask. The heads of these-bolts are drawn down against the ared side of the bar by tightening the nut and Washer assembly I4, to force thei bar serrations llto interlock with the rib serrations 1. `-InV practice; the space required for a contemplatedoperation is determined and a bar or bars of the proper configuration are secured to the ribs selected to givethe proper pattern dimensions.` It'will be appreciated that the relatively narrow width of the ribspermit close centering of the bars and",V therefore, straight bars havebeen located-v'vithinv 15/32 -inches ofthe desired position in flasks of the size designed for the applicants use.` :This dimension could be variedto suit other Iflasksizes. vIn cases where the pattern cannot-y be shifted in the iask to take care of this diierence, and usually such a change can-be made, the lends of the bars may beslightlyr-'oiset to: provide the proper lpattern dimensions.

Flask bars of any depth can be-used, andwhen narrow bars are vemployed it is-L-possiblerthat only one bolt will be requiredztofsecure. each'end to: the flask. i In: bars, .the .depth ofV which are substantially that of the flask, bolts are usedi in al1-V apertures infther selected rowxon eachside of the ilask.

u It will be .appreciated thatv the barholding arrangement described is of extremelyi simple construction, as Aspecial -parts areonot required and thatrthebars; or their positions, may be readily changed. The .very close" center tocen-y ter distance betweenbar holding ribsenablethe bars. to be located in the exact-position required for the pattern. with, i-n some cases, a very'slight oiset of the bar. or bars. Howeverthe bars are secured by the described bar holding arrangement, so, securely that, forall practical, purposes, they are, asstrong, ,rigidand ,vibration prooi as if they, formed an. integral part ci the frask.

"'W'hile', for purposes of illustration, only. one form of flask and bar has been shown, it isolo- V-tending ribs formed integral withfthefask and projecting from the interior surface of the sides,

sone rib being positioned between each adjoining row of apertures, said ribs having a horizontally serrated side wall and a flat side wall tapering-toward the sides of the Ilask, a bar extending across the ask, a Vertical row of horilzontallyextending serrations on one of the verticalsides of the bar at both ends thereof to fit the serrations of the,y selected ribs on opposite side. vportions of the flask against Which...the bar is positioned, the. opposite' sideof the -bar a't both ends'iiaring outwardly. to the extremity of thebar to` ll the space between therib and Vtherovv of apertures bordering the space'and a bolt for each of the 4apertures' inthe saidl row, the head of each boltA beingV drawn against the flared portion of the bar to force the-bartowards the rib-to interlock theserrations ofthe bar and therib.

2; A molders ask comprising'lsideshaving horizontally spaced apertures passing therethrough', a plurality-of vertically;extending-ribs protruding from the inner surface of the sides ofthe ask,l one' of saidribs being ,positionedebd tween each aperture and Vthe adiacenti-aperture horizontally spacedltherefrom, one'o'f theJ vertical sides of each of the ribs having-horizontal serrations thereon, ,a bar extending-across" the il'askg horizontalV serrationsi i on. 4one y'side E 1face of each end of the bar for engagementy witli the serrationsinzthe'ribs, anda bolt passing: through theY apertures in thel sides,rsaid. bolt: engaging the face ofthe-bar oppositethe-serrationsnand urging the bar against the :serratedracetl off' the adjacent. .rib to interlockfthe serrationsririthe bar. and the rib,

f HUGH K. MCGAVOCK.

REFERENCES CITED The `following references are of record in the le of this patent:

UNITED STATES PATENTS 

